Cook beef and onion in heavy skillet, drain.,______,Combine the cream cheese, cottage cheese, sour cream, and eggs; stir well. Spoon a small amount of meat sauce into a lightly greased baking dish.,Layer with half each of lasagna noodles, cheese mixture, pepperoni, meat sauce, and cheese. Repeat layer with rest of ingredients. Sprinkle with parmesan cheese.,Cover, bake for 30 minutes. Let stand 10 minute before serving.